Bandage making machine



Dec. 29, 1936. H. F. KELLER BANDAGE MAKING MACHINE- 4 Sheets-Shee t lFiled March 5, 1936 Dec. 29, 1936. H. F. KELLER BANDAGE MAKING MACHINE 4Sheets-Shegt 2 Filed March 5, 1936 f w m C 3 gm 1 1 w Q1 JM$N a Mar/MM Rm y Ilhflii *w I? "Y M mu Q k\ H. F. KELLER BANDAGE MAKING MACHINE Dec.29, 1936,

4 Sheets-Sheet 3 Filed March 5, 1936 1 7 M MM Mai) ATTORNEYS Deb. 29,1936. H KELLER 2,066,178

BANDAGE MAKING MACHINE Filed March 5, 1936 4 Sheets-Sheet 4 l 1 I I iATTORNEYS Patented Dec. 29, 1936 UNITE STATES 10 Claims.

This invention relates to a machine for making surgical bandages inwhich a fabric layer is supplied with a layer of plaster of paris orsimilar material.

The object of the invention is to provide a machine which can bemanually operated and, particularly, manually controlled toproduce aroll of bandage in an expeditious manner and of a substantially uniformthickness, which can be,

predetermined readily by a quick adjustment of the machine.

A further object is to provide a machine wherein may be made rolledbandage whose interior is readily accessible to water when the bandageis being prepared just prior to use.

With these general objects in view and some others which will beapparent to those skilled in the art from the description hereinafter,the invention consists in a bandage-making machine having the features,details and combinations of parts which will first be described inconnection with the accompanying drawings and then more particularlypointed out. A i

In the drawings,-

Fig. 1 is a side elevation of the machine,

Fig. 2 a front elevation of the machine with a bandage partly completedwith parts of the machine and plaster broken away.

Fig. 3 a detail sectional view on the line 3-3, Fig. 1.

Fig. 4 a sectional view of the arbor and part of a bandage, taken alongthe line 4-4, Fig. 1, but with a part of the crank broken away.

Fig. 5 a detail in perspective illustrating the edge-turning device.

Fig. 6 a transverse section on the line 6-6, Fig. 4.

Fig. '7 a detail sectional View of the arbor with a part of a bandagethereon, and 40 Fig. 8 a detail in perspective illustrating amodification of the invention,

Fig. 9 is a detail View of a fabric roll spindle and collars. v

Fig. 10 is a perspective view of one of the collars.

Referring to the drawings, I0 is a stand which is lower at the frontthan at the back of the machine. Upon this stand is hinged a table IIwhich has ears I2 at its front end, through each of which isscrew-threaded a trunnion screw l3, with a conical end arranged to entera conical trunnion socket formed in the stand, as shown in Fig. 2. Thetrunnion screws are provided with notched ends and each carries alock-nut l4. By means of this hinged connection the table may be swungupward and forward, or may lie back on the stand at a slant, as shown inFig. 1.

The rear and higher end of the table has outward-extending ears, l5,having conical trunnion' sockets. At I6 is a hopper device having a 5front and two sides only, that is to say, without a bottom, top, orback. The sides of this hopper device have sloping bottom'edgesconforming to" the slope of the table, and each is provided with anoutward-extending arm, ward-extending 111%,: through which isscrewthreaded a trunnion screw l3 having a pointed end which enters therespective trunnion'socket in the ears iii of the table, as will beclear from Fig. 2. Each trunnion-screw I8 is provided with 15* alock-nut l9. The hopper device is free to swing down'toward the top ofthe'table H. It has a flange 20 extending outward on the 'sidesandfront, the inside of the hopper device at the front wall being sloped orbeveled as shown'in dotted 6' lines in Fig. 1 to form a lip at thebottom of the front wall, for a purpose hereinafter explained.

' The table II has on one side, an outwarolex-' tending boss 2!, Fig. 3,into which'is screwed a machine screw 22 having a head anda cylin- 25drical portion of enlarged diameter inside the head, this beingindicated at 23 in Fig. 3. On this part 23 is mounted a lever arm 24having a cam device 25, which terminates in a substantially radial face,as shown in Fig. 1, for a pur- 30 pose hereinafter explained. .Theflange 2B of thehopper device is provided at one side with anoutward-projecting arm 26, Figs. 2 and 3, which is arranged to ride onthe cam surfaceof the cam device 25 and carries a bearer arm 21 with 35a hooked end arranged to ride on the cam sur-' face, whereby the hopperdevice may be raised by the cam, and, at the proper position of the camdevice, to engage the radial face of the cam device and thereby preventthe lever arm 24 40 swinging forward again, unless the hopper device islifted upward from the table to raise the hooked end of thebearer arm 21out of engagement with the radial face of the cam device. The bearer arm21 is held to the outward-projecting arm 26 in any suitable way, as forexample, by two screws 28 as shown in Fig. 2. The arm 26, carried by thehopper device, is provided with an adjusting screw 29 which has a milledhead and carries a spiral spring 30 which keeps a pressure on the screwto hold it in any adjusted position. The end of the screw is intended torest on the upper surface of the table. By adjusting the screw 29, thehopper-device may be prevented from contacting with the table and havinga down- 16" angle of one segment being about 90 and that" of the othersegment being about 270, it being understood that these angles are notcriticalv The part having the smaller angle, in cross-section isindicated at 32 and the larger or main body portion of the arbor isindicatedat '33."The latter may be formed with a longitudinal groove asindicated at 34, Fig. 6. The space in the main body portion '33 for thereception of the smaller part 32.. is made somewhat larger in.cross-section than isthe'latter, in .orderto permit the end of thebandage fabric to be clamped between the two parts of the arbor while atthe same time preserving a substantially cylindrical contour for thecomplete arbor. .Each part of the arbor extends beyond the other part atone end only,

7 as shown in Fig- 4, and the extension of each may be completelycircular in cross-section. The. smaller part 32 has its extension 35fitted with.

i a crank handle 36. Where the arbor portions are to bemade of castmetal, the handle may be connected to the part 32. by an embedded screw31, having a threaded portion projecting'beyond the part 32, onto whichthe handle is screwed'by turning it in the direction of rotationwhich'it has when in operation until it abuts against the end of thepart 32. By turning thecrank in the opposite direction it may beunscrewed and taken off.

The embeddedscrew3l has a head 38 which may be suitably formed toprovide recesses for entry of the molten metal of the part 32 at thetime of casting it. In the example illustrated the head of the screw hasa plurality of 'circumferential grooves.

The extension of the main body portion: 33 of the arbor is indicated at39. Itis provided with an outward extending journal member 40 having itsinner end formed to beembedded in the extension39 of the mainv bodyportion 33 of the arbor. In the present example, the embedded end of vthe journal has two flanges 4|, 42, with an intermediate portion 43 ofreduced diameter which maybe knurled-as" indicated in Fig. 4 to insure agood hold on it of the cast metal.

The end of the extension. 392is counterbored to receive the reduced endof the journal bearing 3|. To hold the journal 40 in its bearing, 3|,and still permit rotation o1 the journal. a

machine screw 44 is threaded into the outer end of the journal and isprovided with a head 45 bearing against the end of the journal bearing3|.

In order to connect the two parts 32 and 33 of the arbor, whilepermitting them to be readily disconnected, each is provided at one endwith a dowel pin which enters a mating socket in the other part of thearbor. The dowel pin carried by the smaller part, 32, of the arbor isindicated at 41, and that carried by the larger part, 33, is indicatedat 48, Fig.4.

It will be apparent that the arbor as a whole may be rotated inthejournal bearing 3| carried by the lever arm 24, by turning the crank36. Also, that by pulling the crank bodily outward away from themachine, the smallerpart 32 of spool 49, carrying a roll of bandagefabric, 50,

may be provided. This support consists of a pair of hangers, one ofwhich is visible in Fig. l and indicated at 5|, the other not beingshown. Each hanger has a slot to receive the spindle 52, which i passesthrough the axis of the spool 49.

.To prepare the machine for use in making a bandage, a spool carrying aroll of bandage fabric of the desired width is mounted on a spindle' 52and then put in place in the hangers in such a way that the fabric willunroll. from the outside as shownin Fig. 1. over the edge, of the tableII, thehopper device being swung upward on its trunnions by thecam Theweb of fabricis led up' on the lever arm to allow ready access to thetop' of the tablewhen threading the web. Also, the

two sides of the hopper deviceat the back may be rebated as indicated-at53, Fig. 1-,as required, to give more clearance to permit of a backwardtilting of the hopper-device. i

When the web has been drawn to the front of:

the-machine, its front end maybe clamped in the;

arbor by withdrawing the part 32 from the part 33, putting the web intherecess in the latter, 7,

andthen replacing the part '32. When the'web of fabric has been threadedthrough the-machine and clamped to the arbor, and with the hopper devicein its normal place close to the table, the adjusting screw 29 isadjusted to raise the front bottom edge or lip of the hopper. device there quisite distance above the top surface of thetable so as to leave asmall space between the bottom of the front edge of the hopper deviceand the top surface of the web of bandage fabric, assuming that thelatter was presseddown on the table top. The hopper device is nowcharged with powdered plaster of Paris, or such other powdered materialas is to be employed to make the band age. The material used may havesuitable ingredients to retard the setting of the bandage, if desired. sg

When the hopper device is charged, to the ex-. tent. required, the crankhandle 36 is turned in the direction to wind the bandage fabric onthearbor and'thus draw it, along. the top of the table This causes thepowdered material which rests onthe fabric to be drawn out of the hopperdevice at the front lower edge or lip of the latter. in a layer of, suchthickness as was determined by the adjusting screw 29, the chamferedaorin-- clined inner surface at the bottom of the front.

' bandage fabric so as to cover the latter with a layer of such powderedmaterial equal to the width of the web of bandage fabric, and that thereis no tendency of the powdered material to run out of the hopper deviceexcept where it is drawn out by the top surface of the web. The--bandage is now complete and passes to the arbor where it is wound up.

While the crank 36 is being turned and the bandage wound up, theoperator may lift up slightly on the lever arm 24 thereby relieving thepressure of the coil of bandage material against the table top, due toits gradually increasing Weight, so that the powdered material may notbe compressed as it passes under the arbor. At the same time thefriction of the bandage against the table top serves to determine thetension of winding, and this is determined by the operator. As theoperator may use the right hand to turn the crank and the left hand tomanipulate the lever arm 24, he has such a control over the pressure andtension that he can wind the bandage either loosely or tightly withcorresponding compression of the powdered layer.

If desired the bandage web may be cut when a sufiicient amount has beenwound up on the arbor, most advantageously by cutting the bandage webalong a line transverse to the web where it is lying on the table. Theroll of bandage is removed from the arbor by first drawing outlongitudinally, the smaller part 32 of the arbor. Then the roll may betied with string and put away for future use. To continue the productionand winding of bandages, the end of the bandage web still lying on thetable is freed of its plaster of Paris layer for a short distance back,so as to leave merely fabric at the end. This is clamped between the twoparts of the arbor, as hereinbefore described, and then by turning thecrank, the production and winding of the bandage is proceeded with asbefore. Sometimes it is the practice to use just a strip of bandagefabric of a length only sufiicient for the bandage wanted. In this casethe strip is coated and wound up on the arbor, being drawn entirelythrough the machine. In making a bandage in this way, it is generallythe case that a surplus of powdered material remains in the hopperdevice and, before a new strip of web can be threaded through themachine, it is necessary to empty all powdered material from the hopperdevice. The present machine allows this to be done conveniently bylatching the lever arm 24 in its erect position and then swinging thetable and hopper to the position shown in dotted lines in Fig. 1. Thisallows the hopper device to discharge its contents into some receptacleheld at the front of the table. When the hopper device is emptied inthis way, it, with the table, may be swung back into the position forfurther operation. If a new web is to be threaded through the machine itcan be done at this time, while the lever arm is still held in its erectposition.

By then lifting up the front edge of the hopper device the catch whichholds the lever arm is released therefrom and the latter may be swung toits operative position.

It is sometimes desired to produce a bandage with its edges folded over.To enable this to be done two cloth-turners may be provided, these beingoutside the hopper device and secured to the front thereof. In thepresent embodiment of the invention the cloth-turners, one of which isshown at 54, Fig. 5, comprise an ordinary sheet metal folding footsimilar to those commonly employed on the standard sewing machines, anddimensioned to fold over a sufficient margin of bandage fabric. Asshown, the cloth-turner has one end bent inward to form a supporting andsecuring flange 55 which bears against the front of the hopper deviceand is secured thereto by a screw 56 passing through a slot in theflange, thus allowing for vertical adjustment of the cloth-turner. Thefront of the hopper device has a series of threaded holes for eachclothturner, one series of holes 56a being illustrated in Fig. 5. Thescrew 56 may enter any one of the holes, so the cloth-turner may beadjusted for different standard Widths of bandage. The flange 55 of saidcloth-turner has its bottom edge notched at the inner end, the outerpart of said flange resting in contact with the fabric, while the edgeof the notched part remains at a distance above the surface of thefabric, for a reason which will be explained hereinafter.

When the web of fabric has been threaded through the machine and clampedto the arbor, the cloth-turners may be secured in place, or if desired,they may be put in place, first, before the fabric is threaded through,in which case its margins must be threaded through the clothturners andthe end of the web may then be clamped to the arbor with its edgesturned, or they may be unfolded and lie flat. The flange 55 of thecloth-turners 54 acts as a gage to determine the width of the layer ofpowdered material passing out of the hopper device, this width beingsufficiently less than the Width of the web of fabric to leave a freemargin of fabric at each edge of the web. As the Web leaves the hopperthe margins of the fabric enter the respective cloth-turners and arefolded over onto the layer of powdered material, for a short distance,as will be clear from Fig. 5, where X indicates the portion of the webfolded over.

In using a roll of bandage, it is the practice to immerse it in waterjust before it is to be used, to wet the plaster of Paris, or similarmaterial. By the ordinary method of winding a bandage as herebeforedescribed, the interior of the bandage roll is not readily accessible tothe water, or, at least, care must be used to immerse the bandage rollfor a time suflicient to allow the water to soak in to the interior ofthe roll. To avoid this delay, a modification of the invention may beemployed, this consisting in winding in, with the web of bandagematerial, a plurality of separators, which remain in the roll whenimmersed, to provide channels for the admission of water. When the rollis removed the separators may be withdrawn from the roll. A separatorwhich is very suitable for the purpose is indicated in Fig. 8 at Y. Thisis a transversely curved strip of metal with inturned edges and with aninturned outer end, 1 which may serve as a finger-hold in withdrawingthe separator from the bandage roll. As many as desired of theseseparators may be applied and wound in the bandage roll, one only beingshown in Fig. 8.

An important feature of the present bandage machine is that the amountof machine work is reduced to a minimum while at the same time accuracyof the machine in operation is maintained. The top surface of the tableis made substantially true by machining or grinding, and the trunnionsof the hopper device which connect it to the table, as Well as thetrunnions of the table which connect it to the stand, are readilylocated in proper relative alignment by the use of jigs so that the webwill be wound evenly and Will travel in a line truly at right angles tothe axis of the arbor. Also onaccount of the adjustable conical trunnionscrews and their corresponding sockets, lost motion due to wear may betaken up when necessary, thereby avoiding lateral. play of the hopper,table,

andarbor with relation to each other and to.

the stand.

One very important feature of the invention is that the tableslopesdownward toward the winding arbor and that the latter is somounted that Y the web of bandage fabric will travel in close contactwith the table on its'way to the winding arbor and, also, the roll-ofbandage asit' is wound on the arbor may contact with the table, theamount of pressure of this contact being con trolled by the operator.Hence, as the bandage is wound up the tendency to squeeze out thepowdered material is overcome because of the down-coming powderedmaterial on the flat portion of the web close to the roll.

-A further important feature of the invention is that the pivotal point,or journal bearing, of the lever arm is forward of the axis about whichthe hopper device is angularly removable, and, of course, also at therear of the axis aboutwhich the winding arbor rotates. This simplifiesthe control of the hopper device by the cam and at the same time avoidsa heavy lever arm which might tend to compress the bandageroll againstweight to holdup while winding.

In Fig. 9 is illustrated a spindle 52a for the spool of fabric which isprovided with two heads or collars 52b adjustable to different positionson the spindle, these heads serving to retain the roll of fabric, 50,between them. Each head is of pressed resilient metal having a largecylindrical portion, f,.a-flange, g, extending therefrom and a smallcylindrical portion, it, having an inturned flange, i. The smallcylindrical portion, h, and its flange, z, are slitted longitudinally toserve as resilient fingers or segments.

The spindle 52a has a plurality of peripheral rounded grooves located atsuitable distances apart so that the .heads or collars 521) may beadjusted to distances apart such that rolls of. bandage fabric ofdifferent widths may be accommodated between the heads. The slittedinturned flange, 1', of a head will ride into the respective grooves inthe spindle and retain its head at the place to which it is set. Sincethe said grooves are rounded, the flange will ride out of a peripheralgroove if suflicient force be applied to the head to move it from oneposition to another.

Where a narrow roll of fabric is used itis well to keep it near one endof its spindle so that it will be wound on the outer or free end of thearbor instead of near the journaled end of the arbor. the bandage rollfrom the arbor.

What is claimed is:

1. In a bandage making machine, the combination, with a table having aplane upper surface, of a hopper-device located toward the rear end ofthe table and pivotally connected to the.

table'along an axis transverse to the table and at the rear of thehopper-device, a winding arbor rotatable about an axis parallel to thetop surface,

of the table and over the front part thereof, a journal for said windingarbormovable toward and away from the upper surface of the table, andmeans for rotating said winding arbor.

2. In a bandage making machine, the combination, with a table pivotallymounted near its front end to swing about an axis transverse to thetable and parallel/to its top, a hopper-device having an open bottom,said hopper-device being pivotally connected to the table along an axisThis, makes it somewhat easier to remove transverse to the table and,atthe rear ofgthe: hopper-device, a winding arbor: journal arranged;

above the table and movable toward and from the upper surface thereof, awinding arbor. mounted in said journal and rotatable about an axisparallel to the top surface of the tableand. over the front thereof, andmeans for rotating said winding arbor.

3. In a bandage making machine,

front end to swing about an axis transverse to the table and parallel toits top, a hopper device having anopen bottom, said hopper device being,pivotally connected to the table along an axis,

transverse to the table and at the rearof the hopper device, a lever armpivoted to swing, about an axis transverse to the table and forward of vnal and rotatable about an axis parallel to the.

top surface of the table and'over the front part thereof, and means forrotating saidwlnding arbor.

4. In a bandage making machine,the combination, with an inclined tablesloping downward toward the front, a winding arbor arranged'to revolveabout an axis above the table and transthe combi nation, with a tablepivotally mounted near its verse to its length, said axis being parallelto the top surface of the tablev near its lower end, a journal devicefor said winding arbor, ar-ranged to move toward and from the table, andmeans-v for rotating said winding arbor.

5. In a bandage making machine, the combi nation, with a table having aplane upper surface, a hopper device having an open bottom,

said hopper device being located above the rear part of the table andpivotally. connected to the,

affixed to the lever arm and arranged to move.

the hopper device about its pivotal axis, a winding arbor rotatable inthe journal about an axis transverse to the table and parallel to theupper surface thereof, and means for rotating said winding arbor.

6. In a bandage making machine, the combination, with a table having aplane upper surface, said table being pivotally mounted near its frontend to swing about an axis transverse to the table and parallel to itsupper surface a' 1 hopper device having an open bottom, said hopperdevice being located above the rear part of the table and pivotallyconnected to the table along a pivotal axis transverse to the table andat the rear of the hopper device, a lever arm pivoted to the table toswing about an axis trans-I verse to the table,parallel to the ,uppersurface thereof and forward of the pivotal axis of the hopper device, ajournal carried by said leverarm forward of the pivotal axis of saidlever arm, a

cam device afiixed to the lever arm and arranged to move the hopperdevice about its pivotal axis, a winding arbor rotatable in the journalabout an axis transverse to the table and parallel to the :upper surfacethereof, means for detachably locking the lever arm to-thehopper-device, and

means for rotatingsaid winding arbor.

'7 in a bandage machine, the combination, with a table pivotally mountednear its front end to swing about an axis transverse to the table andparallel to its top, a hopper-device having an open bottom and locatedabove the rear part of the table, said hopper-device being pivotallyconnected to the table, the pivotal axis being transverse to the tableand at the rear of the hopper-device, a lever-arm fulcrumed on the tableto swing about an axis transverse to the table and forward of thepivotal axis of the hopper-device, a journal carried by the lever-armforward of its pivotal axis, above the table and forward of thehopper-device, a cam actuated by the lever-arm, and arranged tolift andlower the front end of the hopper-device, means for detachably lockingthe lever-arm to the hopperdevice, a winding arbor mounted in saidjournal and extending across and over the front end of the table, saidwinding arbor being rotatable in the journal about an axis parallel tothe top surface of the table, and means for rotating said winding arbor.

8. In a bandage making machine, the combination, with a base higher atits rear than at its front, a table having a plane upper surface, saidtable being pivoted at its front part to the front of the stand andnormally resting on said base at an incline sloping downward from theback to the front, a fabric roll supporting device secured to the backof the base, to hold a roll of bandage fabric with its top surface nothigher than the rear edge of the upper surface of the table, wherebyfabric from said roll may be led over and in close contact with thetable top, a hopper-device pivotally connected at its rear to the tableand arranged to discharge pulverulent material onto the bandage cloth,means for ad.- justing the angular position of the hopper-device withrelation to the table top, a winding arbor extending transversely of andabove the table in front of the hopper-device, and mounted to movetoward or from the top of the table, said winding arbor being arrangedto Wind up the bandage fabric and draw it along and over the table topin close contact with the same, and means for rotating said windingarbor.

9. In a bandage making machine, the combination, with a table having aplane upper surface, of a hopper-device located toward the rear end ofthe table and pivotally connected to the table along an axis transverseto the table and at the rear of the hopper-device, a winding arborrotatable about an axis parallel to the top surface of the table andover the front part thereof, a journal for said winding arbor movabletoward and away from the upper surface of the table, and a pair ofmargin folding devices secured in front of the hopper-device andarranged tofold over the margin of the bandage fabric on its way to theWinding arbor.

10. In a bandage making machine, the combination, with a table having aplane upper surface, and a hopper-device located toward the rear of thetable and pivotally connected to the table to swing along an axistransverse to the table and at the rear of the hopper-device, of ajournal, means for supporting the journal over the table in front of thehopper-device to allow it freedom of movement toward and from the top ofthe table, a winding arbor comprising two overlapping parts, one ofwhich is rotatably mounted in said journal, the said parts beingconnected detachably by mortises and tenons to allow the parts to beseparated in the direction of the axis of rotation of the arbor, andmeans for rotating the winding arbor.

HUGO FRANK KELLER.

